No specific info about version 0.1 beta. Please visit the main page of Buttercup on Mac Informer.
StuffIt Archive Manager organizes your archives into collections.
Program that lets you browse the contents of archives, as well as extract them.
MP3-Info lets you view detailed information about your audio files.
Mount ZIP and RAR archive files as disk images on Mac.
Encrypt your mailbox and access e-mails directly without the need of a browser.